Oil-well pump



Patented Mar. 2, 1926.

UNITED STATE PATENT OFFICE.

" THOMAS W. BRI'rrAIn, or LONG BEACH, CALIFORNIA.

OIL-WELL your.

Application filed June 21, 1924. Serial No. 721,418;

The present type ofdeep well pumps em- 1 plo'yed upon 011 wells are extremely unsatisfactory, and inefficient. Despite the presence in numerous-wells of considerable quantity of oil, the resent type of pumping apparatus isena led, only spasmodically to remove anyoil from deep wells around 3000 .to 5000 feet in depth, and many wells which should yield; a large,

profitable flow of oil are practically useless present type due to the inefficiency of the of pumping apparatus. I have conceived that one of the primary difiiculties of the present type of deep well pumps, resides in the failure of the pump to properly draw oil through the bottom valve or standing valve of the pumpand that this difficulty may, to a large extent,

be overcome by providing" aplurality of separate passages of oil controlled by sepa rate standing valves for admitting the oil into'the pump proper. In carrying out my invention, I provide a pump having a plurality of separate inlet passages to the'pump,"

each controlled by an independent standing valve and in at least one of ,the'pas'sages provide a separate plunger for drawing the oil through such assages independent of any passage of oilt rough the other passage.

The invention, and its objects and advantages, will be readily understood fromthe description of the preferred type 'or example of the pump embodying the invention, for which purpose reference is made to the accompanying: drawings in which such pump is indicated in its preferred form.

Inthe drawings: Figure 1 is an elevation of the pump'as sembled, certain parts being in verticalsec ftion.

, Fig. 2 is an enlarged elevation, mainly in verticalsection, of part of the pump shown in Figure 1.

Fig. 3 is a transverse section on the line 33 of Figure 2; and

Fig. 4 is a transverse section on the line 1- 1 of Figure 2.

Referring to the drawings, the pump is illustrated as comprising an upper work ing barrel 2, the lower end of which is threaded to the upper end of a casing 3 which is threaded at a lower point 1 to a casing 5, preferably of a size equal to the size of the working barrel 2. Casing 5 extends downwardly from the casing 3 and provides an inlet to certain parts of the pump, preferably terminating in a slotted section 6 or oil screen. The outer diameter of the casing 3 is preferably equal to the outer diameter of the casing 5 and barrel 2 to pro vide a smooth exterior-surface for the pumping apparatus. The casing 3 provides downwardly and inwardly tapering walls 7 to provide a seat for an outer valve seat member 8. I The tapering walls 7 extending throughout the length of the member and below the point 41 where'the member is con nected witlrtlie casing The central portion of the casing 3 is recessed inwardly from the taperingv walls 7. Below the point 4.- where the-casing 3 connects with the casing 5, the casing 3 is providedwith a stem 10 of reduced diameter, which, at its lower end, is screwed to an inner or lower working barrel 11 which in turn at its lower end provides a seat for a lower standing valve 12 and 1s connected to a pipe 13 terminating ma slotted section 14 operating as a screen and inlet line for oilpassing to the standing valve 12. The standing valve 12 may be. of any preferred or customary construction, being'indicated as provided with a ball 15 resting on a valve seat 16 and enclosed by a cage 17 terminating at its upper end in a threaded pin 18.

i There is thus provided between the working barrel 11 and the casing 5, an annular chamber orpassage 19. 'This' annular passage 19 communicates with the recess 9 in the casing 3 through an annularpassage 20 in the casing 3 and which passage 20 extends from therecess'9 to the base of the stem 10 as indicatedat 21. Ribs 22 are shown extending across the passage 20 for holding the stem 10 to the remainder of the casing 3.

The outer va-lveseat member 8 is provided with an annular recess 23 e tending inwardiy from its exterior which is adapted to register with the recess 9 in the casing 3. Communicating with such recess 23 is an annular passage 24 extending from the upper end of the recess 23 through the top of the outer valve seat member 8, and such passage 24 is normally closed by a ring valve .25, the actual part of the member 8, with which the ring valve 25 engages, is indicated as a separate insert 26 so that the insert 26 may be replaced upon wear without replacing the entire outer valve seat member 8. The valve seat member 8 extends upwardly above the insert 26 as indicated at 27 to provide a guide for the valve 25. Ribs or webs 28 are indicated in Figure 3 extending radially across the passage-way 24 for uniting certain parts of the outer valve seat member 8.

The outer valve seat member 8 is provided with a central bore or passage 29 extending from end to end of the member so as to establish communication between the interior of the lower working barrel 11 and the upper working barrel 2. 'lVithin the upper working barrel 2 a plunger 30 is mounted to reciprocate. The plunger 30 may be of any preferred or customary type, being indicated as provided with a ball working valve 31 at its upper end and terminating in a pin 32 by which such plunger 30 may be attached to a string of sucker rods, or the like, for reciprocating plunger during the pumping operations. The lower end of the plunger 30 connects with a rod 33 of smaller diameter than the bore or passage 29 through the member 8. Such rod 33 extends through the member 8 and is connected with a plunger 34 of any preferred or customary type which is mounted'to reciprocate within the lower working barrel 11, the plunger 34 being provided with a form of working valve 35, indicated as of the ball type.

The operation of the pump mechanism is as follows:

The plunger 30is reciprocated continually through the working barrel 2, such reciprocation being imparted by the rod 33 to the plunger 34, which thus likewise reciprocates within the working barrel 11. Upon each up-stroke of the plungers 30 and 34 oil, or other fluid in the well, is drawn through the screens 6 and'14, the .oilpassing only through the screen 6 .being drawn up through the passage 19 between the casing 5 and working barrel 11 through the passageway 20 and recesses 9 and23 to and through the passage 24 by the ring valve 25 into the lower end of the working barrel 2, the valve 25 being drawn from its seat during this operation. The oil drawn through the screen 14 is drawn by the lower plunger 34, past the ball 15 of the lower standing valve 12 into the lower end of the working barrel 11. Simultaneously, such oil as has been, by a previous down-stroke of the plunger 34 forced above the working valve 35' of such ers "30 and 34,- the ring plunger, is forced upwardly through the bore 29 of the member 8 into the lower end of the working barrel 2.

Upon the downward stroke of the plungvalve 25 closes the .hall 15 of the standing valve 12. The oil abovethe barrel 12 is pressed against the valve 35 to open such valve and admit the oil there above. The oil above the valve 35 and in the lower end of the working barrel 2 then opens the working valve 31 of the plunger 30 and is admitted above such plunger 30 to be forced upward to the top of the well by succeeding reciprocations of the pump.

By this invention, oil, or other fluid within the well, is found to positively be drawn past the lower standing valves of the pump and the pump may be used with efficiency upon deep oil Wells.

While the particular embodiment of the invention herein described is well suited for the purpose of accomplishing the objects of this invention, the invention is not limited to the details of construction of the pump shown, but various modifications may be made without departing from the spirit of the invention. This invention is of the scope set forth in the appended claims.

I claim:

1. A pump of the classv described, comprising a working barrel, a plunger in the working barrel, a standing valve below the plunger, an inlet line to the plunger, a worl ingbarrel within said inlet line and discharging into the first mentioned working barrel, a second and annular inlet line to saidfirst mentioned working barrel, an annular standing valve for said annular inlet line, and a plunger in said second mentioned working barrel.

2. A pump of the class described, comprising a working barrel, .a plunger in the working barrel, a standing valve below the plunger, an inlet line to the plunger, a working barrel within said inlet line and dis charging into the first mentioned working barrel, a casing enclosing said second mentioned working barrel .and providingv an inlet line leading only to said'first mentioned working barrel, and annular standing valve for said annular inlet line, a-plunger in said second mentioned working barrel, and means connecting the plungers together.

3. In a pump of the class described, a casing the upper portion of which serves as an upper working barrel and the lower portion of which provides an inlet line thereto, an annular standing valve between said two mentioned portions of said casing, an axial opening through said annular standing valve, a casing attached to said annular standing valve and enclosed within the lower portion of said first mentioned casing and providing an annular passage therebetween,

a standing valve closing said inner casing, a plunger Within said inner casing, a relatively larger plunger mounted Within said first mentioned casing and a rod interconnecting the two plungersQ 4. In a pump of the class described, acasing provided With two portions one serving as an upper Working barrel and the other of substantially the same diameter serving as an inlet line to said upper barrel, a casing enclosed Within said first mentioned casing and providing an annular passage therebetween, an annular standing valve connect-.

ing the two portions of said first mentioned casing and controlling the supply of fluid from the annular space between said first and second mentioned casings into the upper Working barrel, said standing valve having an axial opening therethrough, a standing valve for said second mentioned casing a plunger mounted to reciprocate in said second mentioned casing, and an enlarged plunger mounted to reciprocate in said upper portion of said first mentioned casing, and a rod interconnecting said plungers.

Signed at Los Angeles, Cal, this 16 day of May, 1924.

THOMAS W. BRITTAIN. 

